nilfs2: fix lockdep warnings in page operations for btree nodes

[mirror_ubuntu-jammy-kernel.git] / fs / nilfs2 / nilfs.h

diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
index 60b21b6eeac0670d0c0057854cc16f8a7ff34514..6c5148de84ffc46efde96bca7fc24edc372654b0 100644 (file)
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -28,7 +28,7 @@
  * @i_xattr: <TODO>
  * @i_dir_start_lookup: page index of last successful search
  * @i_cno: checkpoint number for GC inode
- * @i_btnode_cache: cached pages of b-tree nodes
+ * @i_assoc_inode: associated inode (B-tree node cache holder or back pointer)
  * @i_dirty: list for connecting dirty files
  * @xattr_sem: semaphore for extended attributes processing
  * @i_bh: buffer contains disk inode
@@ -43,7 +43,7 @@ struct nilfs_inode_info {
        __u64 i_xattr;  /* sector_t ??? */
        __u32 i_dir_start_lookup;
        __u64 i_cno;            /* check point number for GC inode */
-       struct address_space i_btnode_cache;
+       struct inode *i_assoc_inode;
        struct list_head i_dirty;       /* List for connecting dirty files */
 
 #ifdef CONFIG_NILFS_XATTR
@@ -75,13 +75,6 @@ NILFS_BMAP_I(const struct nilfs_bmap *bmap)
        return container_of(bmap, struct nilfs_inode_info, i_bmap_data);
 }
 
-static inline struct inode *NILFS_BTNC_I(struct address_space *btnc)
-{
-       struct nilfs_inode_info *ii =
-               container_of(btnc, struct nilfs_inode_info, i_btnode_cache);
-       return &ii->vfs_inode;
-}
-
 /*
  * Dynamic state flags of NILFS on-memory inode (i_state)
  */
@@ -98,6 +91,7 @@ enum {
        NILFS_I_INODE_SYNC,             /* dsync is not allowed for inode */
        NILFS_I_BMAP,                   /* has bmap and btnode_cache */
        NILFS_I_GCINODE,                /* inode for GC, on memory only */
+       NILFS_I_BTNC,                   /* inode for btree node cache */
 };
 
 /*
@@ -267,6 +261,8 @@ struct inode *nilfs_iget(struct super_block *sb, struct nilfs_root *root,
                         unsigned long ino);
 extern struct inode *nilfs_iget_for_gc(struct super_block *sb,
                                       unsigned long ino, __u64 cno);
+int nilfs_attach_btree_node_cache(struct inode *inode);
+void nilfs_detach_btree_node_cache(struct inode *inode);
 extern void nilfs_update_inode(struct inode *, struct buffer_head *, int);
 extern void nilfs_truncate(struct inode *);
 extern void nilfs_evict_inode(struct inode *);